Removing and Installing Loop Start Line Boards
1. Normally you should disconnect the AC power cord from the AC outlet and disconnect the optional battery
back-up assembly from the power supply; however, when necessary, you can remove or install a line board in
an operating system. If you must do this, connect one end of a standard telephone handset coil cord to the
precharge port on the power supply. During step 5, you will connect the other end of this coil cord to the
precharge jack on the line board.
2. Install your static discharge wrist strap on your bare wrist; adjust it for a snug fit. Be sure that the strap is
touching bare skin and is not isolated by clothing. Connect the wrist strap cord between the wrist strap and an
AC or earth ground
NOTE: With the common equipment in the installed position, the ground lug on the side of the cabinet is an
appropriate grounding point since it should have a heavy ground wire connected between it and a good
earth ground.
3. Each new line board is supplied in a static protection bag for safe keeping. When you are ready to install the
line board, remove it from its static protection bag. Conversely, when you remove a line board from the
cabinet, immediately place it in a static protection bag.
4. Locate the proper board slot—on FX Series systems the loop start line boards connect to any universal slot.
5. If you are removing or installing the line board in an operating system, connect the free end of the precharge
cord that you installed in step 1 to the precharge jack on the line board.
6. If you are removing line boards from the cabinet, remove the retaining hardware, pull the boards toward you
until their board edge connectors separate from the cabinet’s backplane connection, and slide the boards free
of the cabinet.
7. To install line boards, orient them with the left and right guides in cabinet board cage. and press the boards
firmly until their board edge connectors properly mate with the connection on the cabinet’s backplane.
8. Make a final inspection to ensure that all line boards are oriented correctly and mated properly.
9. Install and tighten the supplied screws to secure the installed boards to the board cage.
10. Each line board includes a ferrite collar. Snap the ferrite collar around the cable to provide protection against
radio frequency interference.
Dedicated Auxiliary Board Slot
Dedicated CPU Board Slot
Universal Board Slots 1 through 6
(Used for Line or Station Boards)
fulbox2.cdr
Typical Circuit Board
Pre-charge Port Location
Power Supply Assembly
Pre-charge Port Location
Locating Circuit Boards
IMI89–266
Installing The Loop Start Line Board
4 – Removing and Installing Circuit Boards in the Equipment Cabinet
